About Scan request callback patents

I would like to use the Scan request callback function, and I saw that Silicon Laboratories has applied for a patent.

Is it necessary to pay a patent fee to Silicon Laboratories?


■EPO - European publication server
 https://data.epo.org/publication-server/document?iDocId=5311058&iFormat=0

■Bibliographic Data - Application - Patent Center - USPTO
 https://patentcenter.uspto.gov/applications/14252902

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